Hagar, Nick. "How A/B testing can (and can’t) improve your headline writing." Nieman Journalism Lab. Nieman Foundation for Journalism at Harvard, 18 Oct. 2021. Web. 15 Mar. 2025.
APA
Hagar, N. (2021, Oct. 18). How A/B testing can (and can’t) improve your headline writing. Nieman Journalism Lab. Retrieved March 15, 2025, from https://www.niemanlab.org/2021/10/how-a-b-testing-can-and-cant-improve-your-headline-writing/
Chicago
Hagar, Nick. "How A/B testing can (and can’t) improve your headline writing." Nieman Journalism Lab. Last modified October 18, 2021. Accessed March 15, 2025. https://www.niemanlab.org/2021/10/how-a-b-testing-can-and-cant-improve-your-headline-writing/.
Wikipedia
{{cite web
| url = https://www.niemanlab.org/2021/10/how-a-b-testing-can-and-cant-improve-your-headline-writing/
| title = How A/B testing can (and can’t) improve your headline writing
| last = Hagar
| first = Nick
| work = [[Nieman Journalism Lab]]
| date = 18 October 2021
| accessdate = 15 March 2025
| ref = {{harvid|Hagar|2021}}
}}
